I don't think that comparing these ships is exactly fair by just watching them in action.

I would suggest you FLY THEM yourself so you can understand them better .

If you have Notepad++ you can update an old Mod that gives you the basics for flying the ships in the game,
Be sure to use the Mass, speed & weapons of the ship you would meet in the game.
Phobos : http://xelerus.de/index.php?s=mod&id=85&d=1

Playable Xenophobe Fleet ( Warning, you will be EVERYONE'S enemy - After using it, remove it from your extension folder so it doesn't cause relationship issues )http://xelerus.de/index.php?s=mod&id=850